Abstract:
:Gut-associated inflammation plays a crucial role in the progression of colon cancer. Here, we identify a novel pathogen-host interaction that promotes gut inflammation and the development of colon cancer. We find that enteropathogenic bacteria-secreted particles (ET-BSPs) stimulate intestinal epithelium to produce IDENs (intestinal mucosa-derived exosome-like nanoparticles) containing elevated levels of sphingosine-1-phosphate, CCL20 and prostaglandin E2 (PGE2). CCL20 and PGE2 are required for the recruitment and proliferation, respectively, of Th17 cells, and these processes also involve the MyD88-mediated pathway. By influencing the recruitment and proliferation of Th17 cells in the intestine, IDENs promote colon cancer. We demonstrate the biological effect of sphingosine-1-phosphate contained in IDENs on tumour growth in spontaneous and transplanted colon cancer mouse models. These findings provide deeper insights into how host-microbe relationships are mediated by particles secreted from both bacterial and host cells.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Deng Z,Mu J,Tseng M,Wattenberg B,Zhuang X,Egilmez NK,Wang Q,Zhang L,Norris J,Guo H,Yan J,Haribabu B,Miller D,Zhang HGdoi
10.1038/ncomms7956subject
Has Abstractpub_date
2015-04-24 00:00:00pages
6956issn
2041-1723pii
ncomms7956journal_volume
6pub_type
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